After about a week of testing and setting up my new Jolla C I had to repartition my SD-Card that had one partition f2fs and one SWAP to ext4 and swap. I did so using parted from openrepos and creating a new partition table on said card. The card mounted fine on Jolla C as did the SWAP partition. After a while I decided to reboot the phone and since then it has not turned back on. No vibration, nothing.

I fear that somehow the NAND could be affected by partition table writing? Is there a way to connect NAND to a PC and check if everything is okay, or do I have to send in the device?

Connecting the Phone to PC shows QHSUSB__BULK in device manager - maybe this is a starting point towards flashing the device or repairing something.

9: get help from the inner circle
10: be educated QHSUSB__BULK mode basically exports the emmc via USB

[EDIT] (QHSUSB__BULK will either say Qualcomm 9008 (service port) or Qualcomm 9006 (emmc mode) the one we need)

11: expected behaviour on linux: show emmc partitions and list device on /dev/whatever
12: actual behaviour lsusb lists device as connected to one USB bus but does not list as any device to the system
13: conclusion - send in the device - as even with the by now provided original partition table, there seems to be no way to write them back to my Jolla C
14: sob and tremble uncontrollably
15: buy iPhone - jk